Vintage C.M.I. tube guitar / bass amp SG-610

My son wants me to sell his vintage Tube Guitar / Bass amplifier. Model is a C.M.I. SG-610 system. Trying to find a value on this old rascal. Mint cond, he got it from my brother who purchased it in late 60's early 70's. Cant find a thing on values in my Orions books or any where online. Cabinet is perfect and houses 4 x 12 speakers. Not sure on brand, didnt open cab up. Any help out here on a ballpark value ? ,thanks

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    Here's a photo of the Chicago Musical Instruments SG Systems SG-410 that I had restored. I have a number of jpgs of various CMI amp models that I could post if anyone is interested (as a comparison to the Cleartone marque). They range from the SG-100 to the SG-610. I also have an owner's manual for these in digital form, circa 1973-74.
    Doug

    Doug, I would appreciate your further info posted up to the "understanding CMI" sticky thread we have here. That thread gets a lot of hits and enquiries about CMI (both the Chicago and Cleartone versions). Excellent job you've done on your combo, BTW 8)

    doug, i have an sg-610. all the speakers are cracked and in need of repair. any suggestions? i would also like some information on this amp. do you have a manual? i got it in the early 70s used and i want to get it useable again. thanks'.
    fritz

    Fritz, try using the "PM" button to contact Doug. He may respond to that if he's not looked in on this thread.

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